Most of what I know is also self taught. Once you get into the more advanced CS classes at my school, it is very independent (I am the only one in each of my classes this year). I can ask the teacher for help on an assignment or have him explain something if I need him too but most of the time I work independently.
I am now a senior in high school and this year I am taking classes in Data Structures, Assembly Language and Shell Programming. I have already taken classes in C, Unix and Java.
For me, it has been great to be able to take classes that I am actually interested in instead of just the ones that involve the least work like many of my friends have (CS is the only department with that many specialized classes).
I wasn't forced to choose a specialization, if I was, I probably would not have chosen CS at the time. I chose different classes freshman year and started to gravitate towards CS as a sophomore. There was no commitment so I could have stopped CS and focused on something else if it turned out that I didn't like it.
Most of what I know is also self taught. Once you get into the more advanced CS classes at my school, it is very independent (I am the only one in each of my classes this year). I can ask the teacher for help on an assignment or have him explain something if I need him too but most of the time I work independently.